Apparatus for grinding and polishing plate-glass.



J. WURUIKSHANK. APPARATUS P0P. GRINDING AND PoLIsHINc- PLATE GLASS. APPLICATION 'FILED MAY 1,1911.

lgg. Patented Aug.5,19l3.

2 SHEETS-SHEET 1.

C?ew fung.,

J. RKSHNK.

APPARATUS POR GRUNDING AND POLSHING PLATE GLASS.

APPMGATION FILED MA1' 1. w11

LSQ@ Patented Aug. 5, HHB.

2 SHEETS SHEET 2,

. JAMES W. CRUIKSHANK, F PITTSBURGH, P ENNSYLVANIA.

APPARATUS FOR GRINDING ANI) POLISHING PLATE-GLASS.'

Specification of Letters Patent.

ratented Aug. 5,1913.v

Application led May 1, 1911. Serial N o. 624,420.

To all whom t may concern e it known that I, JAMES IV. CRUIK- sHANu, a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Apparatus for Grinding and for grinding and polishing plate glass.

Polishing Plate-Glass, of which the following is a full, clear, and Vexact description, reference beinghad to the accompanying drawing, in which-v Figure l is a diagram showing a preferred embodiment of my invention. Fig. 2 is a partial sectional view on the line II-II of Fig. 1. and Fig. 3 is a sectional view on the une 111411 0f Fig. 1.

My invention has relation to apparatus In the usual processl of doing this work, the

:glass is first laid on a table in its rough state, and 1s thence carried to a grinderwhere it is ground smooth, After leaving the grinder, the joints between the pieces of glass must be cleaned, being full of sand from the grinding operation, the presence of which would destroy and prevent a perfeet polish on the polishing machine. This operation of cleaning the joints is commonly known as jointing. In this operation, the joints are scraped out and a layer of new plaster is put in, after which thetableis takenI to the. polishing machine. The glass is first polished on one side, after which the table is moved toa track where the glass must be turned over so as to be ready to grind the other side thereof, this operation being commonly known as turning. After turning, the table is again taken to the grinding` machine, where the glass is ground on its other side, then again taken to one of the tracks, and is then again jointed. After v jointing, the table is taken to the polishing machine to polish the glass upon the side last turned. AThe next operation is that of removing the glass from the table, known as stripping. After stripping, the table is again ready to lay with rough glass to be taken to the grinder. These various operations are quite complicated, and it will be readily seen that unless the factory is properly arranged, there is likely to be considerable interference between the different tables, which aremoving in opposite directions.'

The main object of my invention is .to provide' an arrangement of apparatus, by which all interference between the tables may be prevented and they may be kept moving continuously in one direction.

Referring to the accompanying drawing, in which I have shown the preferred embodiment of my invention, the numerals 2 indicate a plurality of grinding machines arranged in line; and 3 designates a plurality of polishing machines also arranged vin line. Both of these machines arc of the usual type, having circular disks or tables on Which the glass is ground and polished.

7 designates a longitudinally extending track'upon which the grinding machines 2 and the polishing machines 3 all face. The track 7 is connected with the grinding machine by transverse tacks 4, and With the polishing machines by transverse tracks 5.

6 indicates a transfer car mounted onthe I track 7, and carrying the cross tracks 6a and 6b, upon which the tables stand While they are being transferred.

8, 9, 10, 11, 12, 13, and 15 designate cross tracks on which the tables are placed for the various operations hereinafter' described, these tracks all connecting with the longitudin al track 7 at one end.

14 is a cross track which leads to a polisher 3, located at the oppositeside of the track 7 from the polishers 3, and 1G is a track leading away lfrom the opposite side of the vpolishing machine 3a to a second longitudinally extending track 17, with which the tracks 11, 12 and 13 alsoconnect.

The track 17 is provided with a plurality of turn tables 18, 19, Q0 and 21, by means of which a table can be transferred from the track 17 to either one of the cross tracks 11, 12, 13 and 14.

22 and Q3 designate laying frames of the usual character and which, in practice, are

pivoted so that they can be moved into a horizontal plane level with the table top.

Q4 and 25 designate in dotted lines and diagrammatically overhead traveling cranes for handling the glass.

2G designates storage racks for rough glass.

In order to enable the operation to be more readily understood, I have shown'fla plurality of tables standing on the variokus cross tracks and have lettered these tables asffollows: A designates a table which is laid `with glass ready for the grinders; B a. table in position for the.` turning operation; C a .table -in position'fto Vbe laid with me im? moved ewargr ii'roiir tbe gi'iiiier mici reeriy for ioiniginggiiq e. iabie ioiriieci and ready io be :moveci io one ci' iilze gioiiebing machines; G si ebie boring ieiebeci glass ready. for sirio ping; e iebie in "position So be siripperi; acci i c eebie erippej om?. reaciy for laying with rough The operation ie specieeiiy es '.oiiowe: The teioie F, which is on the transfer cer 6, is ioiiiizei en@ reociy lso go to one of be poi fishers, bei/ing been removed from one of the orcoeirecirs i or 9. it che seme iime, one oi' ehe poiisbere 3 bee iieiebed ize'bie which ie reeoiy izo be removed. The transfer cer is broogbi; icio .position so thee ies .track 6 registers@ Wiib one of be treciie 5 of 011e ci the poiisbrigg machines 3, from which tbe iobie is 'io beV tebeo. This iebie is 'einen puiied clicco io isbe irziooier cer, end che eer is then moved eo that tbe 'tebie F ie opposite' cioe ci tbe polishing machines 3; 'Ehe iobielii is.; theo pushed ci? and ricoveri on to the polishing machine iii iheoisuei meneer. .iiietebie more on ibe transfer cer hailing with e. poiiebeii surface is moved. :Ec

one oir' iz-be ieeckeli, 13, or 1.5, according i0 iwilietber both sides ci tbe gir-ase beve been oiieifieri or oniy one side. if boib sides beve poiisbe ood. che giees is ready ico be stripped., ''.be iebie moveci. on to lbbe reck 3.3 icio ibo position G, from 1wlberiee iis is brc-ugiii: forward on to the imm tabie i9, which iuroei e-ociiis moveei own on the inicie li io *abe position indicoied at H, Where i'Lbe iiiiisbe glass is removed with iiie cici. ci orerbecei traveling creme if oriiy one Sicile oil begiess nos been poiisbesi, however, tbe ebie ie pui; on to either i-reei or crock i5. @n track .15, iziie gies@ i.e iiirrieci io be: ground on be reverse eifie. .iL-l' ii: is moved on to track 1.2 io tbe posiion i), ii; will be moved for- Weri. on io iie corri iebie 20, and then aiong ifiie creek 'i7 to the soeiiion J, Where ii is again turned emi o1-origini dorm tbe track il into vbe posiinori fC or in one o besc positions, i-be .ciales ie turned in the Same "e .y ce. on f l5. it is e metier of convenience icio b oi ibese ksubie is brougi positions tbe depending mainiy upon Whether the icree' bei; iebie already in position if die poiisb will be corri 'plete- 1 by ibe por. g machine 3a, eine table on Crain machine ie first pushed, cbrougii the poiisher om. ico broek i6, and than the already jointed eble i? ie eiioveo .in from ibe erario ii. if '1 has been poiisbeii on -b c fom 'the poiisiie'r 3' .is

operation boizb eifiee p 'moved io eosin-ice i. ce before; but i it has been i;ioiieiwii oii one'eide oiiiy, it is moved izo pof" c. J, for iurniogg, as before de @crib/Jai. ife 'wiii new be eeeoiiied that one of ibo griiiriere eociy to be cbonjeci, and .mit ibe ieiiie cireedy leid wi'b iceeeee one of the tracks 8, 9, and 10, io be joiuie.

and prepared for the poiishers.

, Rough gloss is token from the sioroge room 26m the laying frames 22, by mecca of ibe overhead traveling orarie 2li, ond is removed io one or' tile babies on the track 1l upon which it is iaid in pies-.tec After tbe table H has the giass removei from it, ii, is brought down to tbe irecir l? to ibo position J, Where it is burned on the turn iabie 2i eind mover?. into the positioiii or C, ready io receive rough glass to be t-airen io the grinding machine.

it Wiii be apparent that ibe operation is perfeciiy continuelle; that is to eey, that the tables with ehe poiisheci product ero lmoveci on to track 13 to position G", ere tben brought orwarci, turned and carried iso posiion H, from which they ore moved eiongg track 17 to the track li, where they ire leid' emi go back io the grinders. The tebies, after baring the glass turned on one Side, are potente track l2, where ithey follow on in co-otimious operation 'fio beve the glass turned ovjer on tbe'trecir il.. The auxiliary israel: is also for turning ehe glass, ibis being e convenient position underneath tbe traveling crime 2li.

in imporieni; edieiiiege of my inven iion is Jbe compzictness of tbe orrengemect of e factory irrwbieb. "cile apparatus is thus xed. A. siiii further ofiveniege is the con tinuous operation, so bimbi-bere is no interference between the movemeoie ci tbe tables. Another edvaniege is that tbe babies leid Wi'ii glass iirsin, ere ciweye ilioee lost to be teken ibo the grinders. This is more especoiiy truewben die brook 'ii ie of greater 1engib,.eo es to oiiow more izebiee to push i down in e. continuous line This not only ygives cbc piesier itime to sei, bei. it oleo pre vente a 'biocicde For insieme, in 'the usuel factory crrcngement, iii en empty? iebie is shoveri 'from ibe transfer car on to e. track over are underneath the traveling crane,

which takes the glass from the rough storage racks and brings it to the tables or to the laying cranes. v

lt'will be readily understood that various changes may be made in the embodiment of my invention herein shown and described, without departing from the spirit and scope as defined in the appended claims. Thus, extra tracks may be put in for laying, or the line of machines may be extended, as stated, and the machines may be re-arranged in different Ways.

It will also be obvious that instead of employing the turn tables 18, 19, and 2l, any other suitable means may be employed for transferring the tables from the track 17, to the cross tracks connecting therewith.

I claim:

l. A railway for industrial plants, having a pluralityof machines for finishing vvork pieces, comprising a longitudinally extending track, transverse tracks extending from the longitudinally extending track .to each of the machines, thelongitudinally extending track being below the level of the transverse tracks, a transfer car on the longitudinally extending track having transverse tracks thereon in the same horizontal plane as the transverse tracks, a second longitudinally extending track in thc same horizontal plane as the transverse tracks, and transverse tracks extending from one longitudinally extending track to the other; substantially as described.

2. A railway for industrial plants, having a plurality of machines for iinishing Work pieces, comprising a longitudinally extend.

ing track, transverse tracks extending from the longitudinally extending track to each of the machines the longitudinally extending track being below the level of the transverse tracks, a transfer car on the longitudinall extending track having transverse tracks tiereon in the same horizontal plane as the transverse tracks, a second longitudinally extending track in the same horizontal plane as the transverse tracks, transverse tracks extending from one longitudinally extending track to the other, and turn tables at the junctions between the transverse tracks andthe second longitudinal track; substantially as described.

3. A. railway for industrial plants, havw ing a plurality of machines for finishing Work pieces, comprising a longitudinally ex tending track, transverse tracks extending from the llongitudinally extending track to the machines, said transverse tracksbeing on a higher horizontal plane than the longitudinal track, a transfer car on the longitudinal track, transverse tracks on the transfer lar on the same horizontal plane as the transverse tracks, trucks adapted to be movable over the transverse tracks on the transfer car and to the machines, a plurality of transverse tracks extending from the lungitudinal track to receive trucks from the transfer car, a second longitudinally extending track on the same horizontal plane as the transverse tracks, a plurality of transverse tracks externlinefrom one longitudinal track to the other; substantially as described.

4. A railway for .industrial plants, having a plurality of machines for tiuishing ivork pieces, comprising a longitudinally extending track, transverse tracks extending from the longitudinally extending track to the machines, said transverse tracks being on a higher horizontal plane than the longitudinal track, a transfer car on the longitudinal track, transverse tracks on the transfer car on the same horizontal plane as the trans verse tracks, trucks adapted to be movable over the transverse tracks on the transfer car and to the machines, a plurality oftransverse tracks extending from the longitudinal track `to receive trucks from the transfer car, a second longitudinally extending track on the same horizontal plane as the transverse tracks, a plurality of transverse tracks extending from one longitudinal track to the other, and turn tables at the junctions between the second longitudinal track and the transverse tracks extending therefrom; substantially as described.

ln testimony whereof, l have hereunto set my hand.

J. W. CRUIKSHANK. wWitnesses:

S. Aun, I A. M. `Woomvoiirrr 

